Fingertip Gyro Sprocket 16 Precision Parts Kit Color:Silver It has a ph tolerance

It has a ph tolerance of ph2-12

Educational Toys: Educational toys that are entertaining and entertaining can not only provide children with fun and fun

5V AAA (not included)

Material: Food grade ABS plastic & Stainless

Material: Food-grade ABS

Fingertip Gyro Sprocket 16 Precision Parts Kit Color:Silver It has a ph toleranceStay focused, reduce stress, release inner creativity and imagination. 16 precision parts, enjoy the fun of DIY with children! Easy To Carry, Small, Simple, Discrete and Fun, also effective for Focus and Deep Thought. Perfect Hand Spinners gifts and size suitable for Adults and kids. Ergonomic curved shape design for hand comfort and long term usage. Simply flick and spin for hours with one or two hands. Parameter: Size: 36x60mm Material: Stainless